We have a A400 phone, how can the flashing red light be deactivated on the message key

That's normal. It is indicating your ignition security system is activated and your key is required to start the key or deactivate the security. There is nothing to "reset". If the red light is not flashing when the key is not in the ignition, then there is something wrong with your ignition security system.

This will help...
Nokia Call Fowarding tip

You apparently have unheard messages on the voicemail system provided by your telephone company. This system records messages when someone calls while you're already on the phone. Please contact your telephone company for instructions on accessing their voicemail system.

Of course there is a remedy. Please, deactivate the 'call waiting' service on your phone. To do this, on your phone
- Go to settings, then enter 'call settings'; you should see 'call waiting, enter then deactivate. Hope it helped Enjoy

Log in to your facebook account then goto Account at top right corner ,click it then go to Account setting , at the pate of account setting u will see Deactivate at the bottom ,click Deactivate ...

To turn DND (do not disturb) on and off on any Samsung phone systems (inc. Prostar, DCS, OfficeServ) watch this video clip. Or visit http://www.AbbeyTelecom.com for more vids.

menu >> messages >> write message >> options >> writing language >> Dictionary off

or

menu >> messages >> write message
Press and hold the # key

here is link to your owners manual subzero.com
and here are instructions for using the lock feature..

LOCK For Models 685 and 695, the lock feature is used to prevent unintended ice and water dispensing. When the dispenser is locked, all key pads on the glasswell are deactivated to allow cleaning or to prevent small children from using the dispenser. To activate the lock feature, hold down the LIGHT key pad on the glasswell until the key pad lights flash once and the red LOCK icon is illuminated (approximately five seconds). The lights will remain in the state they were in before the lock feature was activated. To deactivate the lock feature, hold down the LIGHT key pad until the key pad lights flash once and the red LOCK icon is no longer illuminated (approximately five seconds). The lights will remain in the state they were in before the lock feature was deactivated.
Thanks Peyton

the phone is ok, but the SIM can have some services activated, per example: Call Barring; or Call Diverting... in order to deactivate these functions, you'll have to type a deactivation code for each one: to deactivate the Call Barring you'll have to type this specific number: #33# and press the call key, when asked for a password, please enter 0000 and press the confirmation key. To deactivate the Call Diverting, please call this number: ##002# and then the phone will display a message like " Divert Cancelled " that is the confirmation that the Call Divert is deactivated, good luck. :)

Open the door insert key in ignition. turn to on

Now hold down the red button which should be flashing, untill silent

this will deactivate the alarm.